Dynamic listview in flutter - flutter

Question

I'm new to Flutter, but I'm trying to make an app with a ListView. The ListView is a list of exercises, within each exercise the number of sets can be added. The problem comes when i press the button add exercise. The above exercise with sets is just copied. I would like a new exercise tab with 0 sets. Below the code can be found.
Here is a picture of the list.
final decoratedField = InputDecoration(
filled: false,
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
),
hintText: "null",
);
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: Column(
children: [
titleSection,
// ignore: unnecessary_new
new TextField(
controller: eCtrl,
onSubmitted: (text) {
litems.add(text);
eCtrl.clear();
setState(() {});
},
),
Expanded(
// ignore: unnecessary_new
child: new ListView.builder(
itemCount: litems.length,
itemBuilder: (BuildContext ctxt, int Index) {
return Card(
child: Padding(
padding: EdgeInsets.all(10),
child: ExpansionTile(
initiallyExpanded: true,
title: Text(
litems[Index],
style: const TextStyle(
fontSize: 20,
fontWeight: FontWeight.bold,
),
),
subtitle: Row(
children: [
Expanded(child: Text(" ")),
//Expanded(child: Text("data")),
//Expanded(child: Text("data")),
//Expanded(child: Text("data")),
],
),
// ignore: sort_child_properties_last
children: <Widget>[
ListView.builder(
shrinkWrap: true,
itemCount: sets.length,
itemBuilder:
(BuildContext context, int Index1) {
return Dismissible(
key: UniqueKey(),
// only allows the user swipe from right to left
direction:
DismissDirection.endToStart,
// Remove this product from the list
// In production enviroment, you may want to send some request to delete it on server side
onDismissed: (_) {
setState(() {
sets.removeAt(Index1);
});
},
// ignore: sort_child_properties_last
child: Card(
elevation: 0,
child: Padding(
padding: EdgeInsets.all(1),
child: ListTile(
title: Text(
" ",
style: const TextStyle(
fontSize: 10,
fontWeight:
FontWeight.bold,
),
),
subtitle: Row(
children: [
Expanded(
child: Text(" "),
),
Expanded(
child: TextField(
decoration:
decoratedField,
),
),
Expanded(
child: TextField(
decoration:
decoratedField,
),
),
Expanded(
child: TextField(
decoration:
decoratedField,
),
),
],
),
))),
background: Container(
color: Colors.red,
margin:
const EdgeInsets.symmetric(
horizontal: 15,
),
alignment: Alignment.centerRight,
child: const Text(
"Delete",
style: TextStyle(
color: Colors.white,
),
)));
}),
Padding(
padding: EdgeInsets.all(10),
child: ElevatedButton(
onPressed: () {
sets.add('sets-test');
setState(() {});
},
child: const Text('+ Add Set')),
),
const SizedBox(height: 5),
],
leading: IconButton(
icon: const Icon(
Icons.close,
color: Colors.red,
),
onPressed: () {
litems.removeAt(Index);
setState(() {});
},
),
)));
})),
ElevatedButton(
onPressed: () {
litems.add("new");
setState(() {});
},
child: const Text('Add Exercises')),
ElevatedButton(
onPressed: () {
createUser(user1, "5");
exercise.setExerciseTotals();
//saveExercise(exercise);
final workout = Workout([exercise, exercise1], "Det gik fint",
"10", 60, "type", "name", true, 0, 0, 0);
//workout.setWorkoutTotals();
saveWorkout(workout, userID);
},
child: const Text('pop')),
bottomSection,
],
),
));
}

Answer 1

You are not copy the item, you logic is that add new Item with null value, change decoratedField to this:
final decoratedField = InputDecoration(
filled: false,
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
),
hintText: "0",
);